MCQ Questions for Class 11 Biology: Ch 10 Cell Cycle and Cell Division

MCQ Questions for Class 11 Biology: Ch 10 Cell Cycle and Cell Division

1. Spindle fibres attach on to
(a) Telomere of the chromosome
(b) Kinetochore of the chromosome
(c) Centromere of the chromosome
(d) Kinetosome of the chromosome
► (b) Kinetochore of the chromosome

2. During mitosis ER and nucleolus begin to disappear at
(a) Early metaphase
(b) Late metaphase
(c) Late prophase 
(d) Early prophase
► (c) Late prophase 

3. The mechanism of distributing centriole pairs to the daughter cells is called
(a) Equational division
(b) Haplontic division
(c) Astral division
(d) Reductional division
► (c) Astral division

4. Cell division is initiated in plants by
(a) Cytokinin
(b) Abscisic acid
(c) Gibberellin
(d) Auxin
► (a) Cytokinin

5. A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has:
(a) same number of chromosomes but twice the amount of DNA
(b) twice the number of chromosomes and four times the amount of DNA
(c) four times the number of chromosomes and twice the amount of DNA
(d) twice the number of chromosomes and twice the amount of DNA
► (b) twice the number of chromosomes and four times the amount of DNA

6. In which stage, the cells remain metabolically active but do not proliferate?
(a) G1-phase
(b) G2-phase
(c) Go-phase
(d) S-phase
► (c) Go-phase

7. Which one is not a significance of meiosis division?
(a) Formation of spores and gametes
(b) New recombination of genes
(c) Number of chromosome remain same
(d) Number of chromosome reduced to half
► (c) Number of chromosome remain same

8. Multinucleate condition arise when Cytokinesis does not follow karyokinesis, this type of cells are called as
(a) Holotype
(b) Coenocyte
(c) Prototype
(d) Uninuleate
► (b) Coenocyte

9. In meiosis crossing over is initiated at
(a) Pachytene
(b) Leptotene
(c) Zygotene
(d) Diplotene
► (a) Pachytene

10. In animal cells, Cytokinesis takes place by furrow deepening centripetally and formation of two daughter cells. This method is known as
(a) Phragmoplast
(b) Cleavage Cytokinesis
(c) Cell plate formation
(d) None of these
► (b) Cleavage Cytokinesis

11. Chromosome appeared beaded during
(a) Diplotene
(b) Leptotene
(c) Diakinesis
(d) Panchytene
► (b) Leptotene

12. The resting phase is otherwise called as
(a) Prophase
(b) Interphase
(c) Metaphase
(d) Telophase
► (b) Interphase

13. Which of the phases of mitosis is the longest?
(a) Telophase
(b) Prophase
(c) Anaphase
(d) Metaphase
► (b) Prophase

14. Astral body are formed of
(a) Microtubules
(b) Intermediate filaments
(c) Microfilaments
(d) Microvilli
► (a) Microtubules

15. In cell cycle, DNA replication takes place in
(a) G1 phase
(b) G2 phase
(c) Mitotic metaphase
(d) S phase
► (d) S phase

16. Cell growth results in disturbing the ratio between
(a) Nucleus - chromosome ratio
(b) Cytoplasm-chromosome ratio
(c) Cytoplasm-spindle fibre ratio
(d) Nucleus-cytoplasm ratio
► (d) Nucleus-cytoplasm ratio

17. Which of the following statements is not true for cancer cells in relation to mutations?
(a) Mutations in proto-oncogenes accelerate the cell cycle.
(b) Mutations destroy telomerase inhibitor.
(c) Mutations inactive the cell control.
(d) Mutations inhibit production of telomerase.
► (d) Mutations inhibit production of telomerase.

18. In animal cells, the mitotic division is seen in
(a) Haploid somatic cells
(b) Diploid cells
(c) Diploid somatic cells
(d) Haploid cells
► (c) Diploid somatic cells

19. The number of chromosome and the amount of DNA are changed in
(a) Metaphase and M phase
(b) Anaphase and S phase
(c) Interphase and S phase
(d) None of these
► (b) Anaphase and S phase

20. In ‘S’ phase of the cell cycle:
(a) Amount of DNA doubles in each cell.
(b) Amount of DNA remains same in each cell.
(c) Chromosome number is increased.
(d) Amount of DNA is reduced to half in each cell.
► (a) Amount of DNA doubles in each cell.

21. Crossing over results the exchange of genetic material, which occurs between
(a) Non-sister chromosomes
(b) Sister chromatids
(c) Non-homologous chromosome
(d) Homologous chromosomes
► (d) Homologous chromosomes

22. In the somatic cell cycle
(a) In G1 phase DNA content is double the amount of DNA present in the original cell 
(b) DNA replication takes place in S­ phase
(c) A short interphase is followed by a long mitotic phase
(d) G2 phase follows mitotic phase
► (b) DNA replication takes place in S ­phase

23. A cell plate is laid down during
(a) Cytokinesis
(b) Interphase
(c) Karyokinesis
(d) None of these
► (a) Cytokinesis

24. In between two walls of adjacent cells are seen
(a) Cell wall
(b) Cytoplasm
(c) Middle lamellae
(d) Plasma membrane
► (c) Middle lamellae

25. Division of nucleus without being followed by cytokinesis results into
(a) Phargmoplast
(b) Polyploidy
(c) Uninucleate condition
(d) Multinucleate condition
► (d) Multinucleate condition

26. Which of the following phases in mitosis is in correct order?
(a) Prophase, telophase, metaphase, anaphase
(b) Prophase ,metaphase, anaphase, telophase
(c) Anaphase, telophase, metaphase, prophase.
(d) Metaphase, prophase, anaphase, telophase
► (b) Prophase ,metaphase, anaphase, telophase

27. Synapsis occurs between
(a) A male and female gametes
(b) Ribosome and m-RNA
(c) Spindle fibres and centromeres
(d) Two homologous chromosomes
► (d) Two homologous chromosomes

28. Plants show mitotic divisions in
(a) Haploid cells
(b) Haploid cells and diploid cells
(c) Somatic cells
(d) Diploid cells
► (b) Haploid cells and diploid cells

29. Meiosis is evolutionary significant because it result in
(a) genetically similar daughters
(b) four daughter cells
(c) eggs and sperms
(d) recombinations
► (d) recombinations

30. Best stage to observe shape, size and number of chromosomes is
(a) interphase
(b) metaphase
(c) prophase
(d) telophase
► (b) metaphase
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